#include<iostream>
using namespace std;
const int N = 40;
int f[N][N];
int n, m;
int main()
{
	cin >> n >> m;
	f[1][1] = 1;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			if (i == 1 && j == 1)continue;
			if (i % 2 || j % 2) {
				f[i][j] += f[i][j - 1] + f[i - 1][j];
			}
		}
	}
	cout << f[n][m] << endl;
	return 0;
}